Let's break it down:
* Leron: The first syllable "le" is stressed, making it the rhythmic syllable.
* Sinta: The first syllable "sin" is stressed, making it the rhythmic syllable.
Therefore, the rhythmic syllables are le and sin.
It's important to note that the rhythm of "leron sinta" can vary depending on the context and the speaker's intention. However, the most common way to pronounce it would be with the stressed syllables falling on "le" and "sin".